package com.hbnu.abstractinterface;

/**
 * 抽象类
 *
 * @author kittychen
 * @date 2025-09-16 下午 2:25
 */
public abstract class AbstractDemo01 {

    private String username;
    private static int age;

    private static final double PI = 3.1415926;

    public AbstractDemo01() {
    }

    public AbstractDemo01(String username) {
        this.username = username;
    }

    public void method01() {
        int a = 10;
        System.out.println("抽象类中的具体方法......");
    }

    public abstract void method02();

}
